Example using c programming to dynamically allocates an array of structures to store student’s names and grade. The grades are then displayed back to the user in ascending order

The following example dynamically allocates an array of structures to store students names and grade. The grades are then displayed back to the user in ascending order.

#include <string.h>
#include <malloc.h>

struct student
{
char *name;
int grade;
};

void swap(struct student *x, struct student *y);

int main()
{
struct student *group;
char buffer[80];
int spurious;
int inner, outer;
int counter, numStudents;

printf("How many students are there in the group: ");
scanf("%d", &numStudents);

group = (struct student *)malloc(numStudents *
sizeof(struct student));

for (counter=0; counter<numStudents; counter++)
{
spurious = getchar();

printf("Enter the name of the student: ");
gets(buffer);
group[counter].name = (char *)malloc((strlen(buffer)+1) * sizeof(char));
strcpy(group[counter].name, buffer);

printf("Enter grade: ");
scanf("%d", &group[counter].grade);
}

for (outer=0; outer<numStudents; outer++)
for (inner=0; inner<outer; inner++)
if (group[outer].grade <
group[inner].grade)

swap(&group[outer], &group[inner]);

puts("The group in ascending order of grades ...");

for (counter=0; counter<numStudents; counter++)

printf("%s achieved Grade %d \n”, group[counter].name, group[counter].grade);

return 0;
}

void swap(struct student *x, struct student *y)
{
struct student temp;

temp.name = (char *)malloc((strlen(x->name)+1) *
sizeof(char));

strcpy(temp.name, x->name);
temp.grade = x->grade;

x->grade = y->grade;
x->name = (char *)malloc((strlen(y->name)+1) *
sizeof(char));
strcpy(x->name, y->name);
y->grade = temp.grade;
y->name = (char *)malloc((strlen(temp.name)+1) *
sizeof(char));
strcpy(y->name, temp.name);
}

The execution of the output will be as follows:

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